This file photo taken on September 15, 2019, shows an Aramco oil facility near al-Khurj area, just south of the Saudi capital Riyadh. (FAYEZ NURELDINE / AFP)

Saudi-led coalition warplanes pounded Yemeni rebels’ military bases in retaliation for a weekend attack on the heart of the kingdom’s economy.

The raids on the Yemeni capital, Sana’a, targeted military camps, as well as Houthi rebel facilities near the city’s airport and in its suburbs, residents and rebel-run Al-Masirah TV said. A separate strike hit a rebel target in the port province of Hodeidah.

The Iran-backed Houthis attacked a Saudi Aramco oil refinery in Riyadh on Friday with six bomb-laden drones. The assault caused a fire that was later controlled with no impact on oil supplies or derivatives, state-run media said.

The Iran-backed Houthis attacked a Saudi Aramco oil refinery in Riyadh on Friday with six bomb-laden drones. The assault caused a fire that was later controlled with no impact on oil supplies or derivatives, state-run media said. No casualties were reported.

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The escalation is liable to hinder US efforts to end the seven-year war in Yemen, which has created the world’s worst humanitarian crisis, with widespread famine and disease. The conflict is also being complicated by US President Joe Biden’s standoff with Iran over how to resurrect a 2015 accord designed to curb the Islamic Republic’s nuclear program.

The Saudi-led coalition joined the conflict in neighboring Yemen in 2015 to try to restore its internationally recognized government.

The Houthi attacks on Saudi Arabia rarely claim lives or cause extensive damage but their frequency has increased in recent months, creating unease in the Gulf, a region key to global oil production and transit. Several attacks on the Saudi capital, Riyadh, have been intercepted, Saudi authorities have said.

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On Sunday, Houthi minister of higher education Hussein Hazib wrote on Twitter that a top military commander for the rebels -- Zakaria Al-Shami -- had died, without explaining the circumstances. Al-Shami was also transport minister for the Houthi government and one of the top 40 most-wanted figures by the Saudi coalition.